CN103381874A - Turntable sensing element with multiple magnetic plates and non-uniform distribution of magnetic flux - Google Patents
Turntable sensing element with multiple magnetic plates and non-uniform distribution of magnetic flux Download PDFInfo
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- CN103381874A CN103381874A CN2013103094218A CN201310309421A CN103381874A CN 103381874 A CN103381874 A CN 103381874A CN 2013103094218 A CN2013103094218 A CN 2013103094218A CN 201310309421 A CN201310309421 A CN 201310309421A CN 103381874 A CN103381874 A CN 103381874A
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Abstract
The invention discloses a rotating disc type sensing element with unevenly distributed multiple magnetic sheets and magnetic fluxes, belongs to the technical field of providing signals by magnetic induction, and particularly relates to a technology for providing control signals by multi-point magnetic induction on a rotating part. A plurality of permanent magnet pieces distributed in a ring shape are fixedly arranged on the rotating disc, the intervals and the magnetic fluxes of the permanent magnet pieces are different, and the magnetic polarities of the adjacent permanent magnet pieces are opposite on one surface of the rotating disc, namely the magnetic polarities of all the permanent magnet pieces on one surface of the rotating disc are distributed in an N pole, an S pole and an N pole … …; the Hall is arranged at a position close to the permanent magnet sheet. The advantages are that: the magnetic polarities of adjacent permanent magnet pieces are in an NS opposite distribution mode, so that the Hall can obtain rectangular wave signals, and the signals can be conveniently subjected to digital processing; by utilizing different distances and different magnetic fluxes, the rectangular wave signal can represent the position of the permanent magnet sheet on the rotating disc, and the purposes of different rectangular waves are determined.
Description
Technical field
The invention belongs to magnetic induction the technical field of signal is provided, particularly relate on rotatable parts, carry out the technology that multi-point magnetic induction provides control signal.
Background technology
The Chinese patent 201020295192.0 of Yebao Vehicle Material Industry's application " hooking pawl formula moment sensor " discloses a kind of morpet sensing device, sensing device comprises that magnetic part and elastic component coordinate, and experience the sensing device of moment.After period of service was long, the elasticity modulus variation of elastic component will cause the control effect of transducing signal and controlled motor to change, and the power-assisted effect becomes and need to mismatch with people's power-assisted.And complicated with the project organization of elastic component, manufacturing cost is high.
The Chinese patent 01201843.0 " automatic detecting device of electric booster bicycle " of University of Science ﹠ Technology, Beijing's application discloses a kind of automatic detecting device of electric booster bicycle, no touch detects to be pedaled power, speed and turns to, this device is established respectively magnetic sheet on the inside and outside wheel disc of relative motion, on interior wheel disc, spring is arranged, use spring reset between inside and outside wheel disc, the electric signal of surveying the magnetic sheet generation of relative motion on inside and outside wheel disc with two Halls on support represents to pedal power, speed and turns to.
Shortcoming (1) is not durable with elastic component: after period of service was long, the elasticity modulus variation of elastic component will cause the control effect of transducing signal and controlled motor to change, and the power-assisted effect becomes and need to mismatch with people's power-assisted, complex structure, and cost is high.
each magnetic sheet group of shortcoming (2) is identical and the magnetic pole set-up mode is all identical, and can not represent the position separately of different magnetic sheet groups, can not express the special power-assisted demand of diverse location: from Fig. 3 of 01201843.0 patent, 4, 5, 6 and the record explanation of the 2nd section of Instructions Page 2, each magnetic sheet group (comprises a magnetic sheet 4, a magnetic sheet 5, a magnetic sheet 6) magnetic pole set-up mode is all identical, only namely simply from being provided with again identical magnetic sheet group at interior diverse location of taking turns, the position separately that can not represent different magnetic sheet groups, the state of kinematic motion that can not represent ad-hoc location, and the people is by bike the time, pedal with each position corresponding with pedal at state of kinematic motion, own special power-assisted demand is arranged, but the identical structure of this each magnetic sheet group of this patent, can not give expression to the special power-assisted demand of each diverse location on pedal.
Each site signal indifference of shortcoming (3) makes man-machine mismatching: each magnetic sheet group is the same, each magnetic sheet group can not represent the position of this magnetic sheet group on interior the wheel, the signal that Hall is exported can not represent the position of stretcher and other magnetic sheet group, the signal that is Hall output can not represent that different foot positions are to the demand of power-assisted, cause the demand of power-assisted and provide the time of power-assisted to mismatch, namely man-machine cooperation is undesirable.
The shortcoming sine wave output makes the magnetic sheet group Edge Distance can not be less than 4 centimetres, generally take 5 centimetres as good, can establish magnetic sheet group number very little and make, man-machine cooperation is undesirable: each magnetic sheet group is identical, Hall output is that sinusoidal waveform is as control signal, as the control signal sinusoidal waveform, certain peak valley difference must be arranged, because the magnetic sheet group of this patent needs certain-length to represent forward and reverse motion, be to establish at most 8 magnetic sheet groups on the rolling disc circular trace of 20 centimetres at diameter, generally take 5 as good, Hall just can have the sine wave signal of controlling function.That is to say, this technical scheme of 01201843.0 patent is used for morpet, magnetic sheet group limited amount only in 8, control signal very little, man-machine cooperation is undesirable.If but more than 8 magnetic sheet groups, when people's treadmill was very fast, the signal graph of Hall output was close to a horizon, this signal is not controlled function, can not control electrical motor, when making it need power-assisted especially, loses assist function.
Shortcoming (5) signal blind zone reaches miter angle, really can not get power-assisted when needing power-assisted during startup: well-known, it is minimum in summit moment that the people steps on bicycle pedal, the zone that needs most power-assisted from leaving 10-45 degree angle, summit, but the angle between each magnetic sheet group of this patent is 45 degree, leaves summit 10-45 degree angular zone neither one magnetic sheet group at stretcher, also with regard to the neither one control signal, when consequently needing most power-assisted, but the motor of morpet really can not power-assisted.
In a word, except with the not durable complex structure again of elastic component, fit structure characteristics because of Hall and magnetic sheet group, the rotating disk size diameter is in 20 centimetres, and having placed restrictions on magnetic sheet group quantity is 8 groups, and magnetic sheet group number can not arbitrarily increase, make man-machine cooperation undesirable, and can not get power-assisted when starting, the power-assisted demand with provide power-assisted not mate, cyclist's traveling comfort is poor; As increasing by force magnetic sheet group quantity, its transducing signal loses again the Power assisted control function.
The Chinese patent 03264387.X " timing sensor of electric boosting bicycle " of Wang Naikang application discloses without elastic component, only with moving, fixed two rotating disks, inlay two permanent magnetic steels above Moving plate, inlay three Hall elements above price fixing, bicycle pedal circles, each Hall produces two pulses, and three Hall elements produce six pulses.Divide folding can get three characteristics, four shortcomings are as follows:
Characteristics (1) are for obtaining six impulse singlas, can only be each permanent magnetic steel same pole in one side: each Hall will produce two pulses, can only be the same face that the same pole of two permanent magnetic steels is located at Moving plate, namely in certain one side of Moving plate, two permanent-magnet magnetic steel capital be the arctic or be all the South Pole.If at the same face of Moving plate, a permanent magnetic steel is the arctic, another is the South Pole, and pedal circles, and each Hall just can only produce a pulse, and three Halls just only have three pulses, and this does not just conform with this patent specification and has put down in writing.In order to increase pulse count, improve and control effect, can only be that each permanent magnetic steel same pole is in one side.
Characteristics (2) permanent magnetic steel is for expression pedal fixed position, three Halls represent the pedal travel position: because pedal and Moving plate are to synchronize rotation, so a permanent magnetic steel is fixed respectively in two positions on the Moving plate corresponding with two pedals, where some pedals turn, and where corresponding permanent magnetic steel also turns; But only turn in the position that Hall is arranged, could send control signal by Hall, the motor of commander's morpet produces the power-assisted that needs and rotates.
The position of characteristics (3) middle different period pedal travels because Hall can not represent to circle, just can not be only with a Hall: the different periods of pedal in circling, the power-assisted demand there is very big difference, embody the variation of this power-assisted demand, this patent is located at respectively 180 with three Halls and spends the angle with three interior positions, two permanent magnetic steels are located at respectively two pedal positions, pedal turns in the position that Hall is arranged, and this Hall represents that with regard to output signal pedal has arrived the position of this Huo Yuan.But there is again following shortcoming with a plurality of Halls.
These characteristics as the morpet sensor have three shortcomings:
Shortcoming (1) represents respectively the fixed position of two pedals with two permanent magnetic steels that there is no an otherness, just can only represent with a plurality of Halls the turned position of pedal: two permanent magnetic steels do not have otherness, advantage is can be regardless of the fixed position that represents respectively two pedals of left and right pin, make its left and right human hair combing waste give birth to the power-assisted demand, can produce identical motor power-assisted effect; But shortcoming is permanent magnetic steel itself just can not represent the turned position of pedal, and can only be located at the turned position that different angle positions represents pedal with a plurality of Halls, thus can not be only with a Hall, and must use a plurality of Halls.
Shortcoming (2) can not be only with a Hall, and three Halls must cause three control signals that original segmentation error is arranged, make the distortion of power-assisted demand model, naturally produce power-assisted output inconsistent with the power-assisted demand: no matter morpet is one or two motor, its transducing signal of controlling motor can only just can reach the purpose of controlling motor with a transducing signal input electric machine controller; And this patent is controlled motors with three Halls, must merge into one to three control signals of three Halls and could input electric machine controller after merging control signal.The parameter sensing of three Halls can not be the same, particularly due to after variation of ambient temperature, period of service length, the parameter sensing of three Halls may be widely different, when its result causes identical power-assisted demand, the output of different Halls be different voltages, cause motor to produce different power-assisted output, power-assisted output is inconsistent with the power-assisted demand; In like manner during identical power-assisted demand, the output of different Halls may be identical voltage again, cause motor to produce the output of same power-assisted, also produce power-assisted output and the inconsistent problem of power-assisted demand.
shortcoming (3) merges control signal and easily produces signal drift, merging control signal and electric machine controller are not mated, power-assisted demand model distortion: due to variation of ambient temperature, after period of service is long, the parameter sensing of three Halls may be widely different, three control signal point of connection of three Halls must change, the merging control signal of identical power-assisted demand generation will produce the signal drift of segmenting, merge control signal as a whole signal distortion that produces, it is the distortion of power-assisted demand model, any one that causes that electric machine controller selects three control signals all can produce power-assisted output and the inconsistent problem of power-assisted demand as benchmark.
Shortcoming sensing site can not arbitrarily increase, the sensing site very little, the motor operation is just not steady, make people by bike feel very uncomfortable: owing to shortcoming (1) and shortcoming (2) being arranged all because Hall quantity causes greater than one, clearly Hall quantity is measured more and more, and shortcoming (1) and shortcoming (2) performance are more serious.So the morpet that this patent provides can only be to make people by bike feel the morpet that traveling comfort is very bad.
Shortcoming (5) signal blind zone reaches 42 and spends the angle, really can not get power-assisted when needing power-assisted during startup: well-known, it is minimum in summit moment that the people steps on bicycle pedal, the zone that needs most power-assisted from leaving 10-45 degree angle, summit, but the angle between each Hall of this patent is the 42.5-43.5 degree, leaves summit 10-42 degree angular zone neither one Hall at stretcher, also with regard to the neither one control signal, when consequently needing most power-assisted, but the motor of morpet really can not power-assisted.
In a word, this patent is to control the technical scheme of assistant mode with a plurality of Halls, because can only represent with a plurality of Halls the turned position of pedal, a plurality of control signals of a plurality of Halls must have original error, it merges control signal and easily produces again signal drift, all can cause the distortion of power-assisted demand model, i.e. the identical power-assisted demand of different time, but obtain different power-assisted effects; Hall quantity is measured more and more, and the distortion of power-assisted demand model is more serious, the quantity of having placed restrictions on you, the Hall small number and to produce the motor operation just not steady, make people by bike feel very uncomfortable, and can not get power-assisted when starting.Make it want the power-assisted demand model undistorted, and want motor to operate steadily and always attend to one thing and lose sight of another on these two problems, can not get both.
International Patent Application WO/099/13558AI discloses the sensor that is used for controlling on electrical motor electrical motor, this sensor is that depression is set on rolling disc, permanent magnets is entrapped in the depression of rolling disc, this technique is bored depression on rolling disc, can only be by hand in the depression that is entrapped in rolling disc of one piece one piece of many pieces of permanent magnets, consumption very consuming time is artificial, and depression and the essential size shape no-float of permanent magnets, and this point is difficult to accomplish.Because caved in greater than permanent magnets, rolling disc is when rotating, and permanent magnets is vibrated in depression, very fragile permanent magnets; Depression is the flush fit permanent magnets, is difficult to again permanent magnets is entrapped in the depression of rolling disc.So, can only be the fixed position in the disposable depression that is permanently affixed at rolling disc of permanent magnets, make its at rolling disc when rotating, permanent magnets can not vibrated.But such structure has been placed restrictions on permanent magnets and has been regulated in the change in location of rolling disc, causes a sensor to only have a kind of sensing model.
Summary of the invention
The purpose of this invention is to provide the sensitive member that only obtains speed and acceleration signal with each permanent magnetism sheet on a Hall and rolling disc, be a kind of a plurality of permanent magnetism sheets to be arranged that technique is simple, the permanent magnetism sheet can not be shifted and sensing model is stable, and sensor can have the sensitive member of multiple sensing model; But be a kind of in induction region, can increase permanent magnetism sheet quantity as far as possible, utilize to greatest extent the rolling disc displacement information, how again output information pinpoint sensitive member.Use is measured moment without elastic component and other machinery on morpet, also can make the power-assisted demand good with the power-assisted coupling that provides, the morpet sensor sensitive member that motor operates steadily.
Design of the present invention is: the permanent magnetism sheet is seized on both sides by the arms to be fixed on rolling disc and to seize on both sides by the arms between the magnetic sheet layer, and during turn disc, the permanent magnetism sheet remains on the original position of rolling disc, can not move with respect to rolling disc, and sensing model is stable; Want a sensor can be adjusted to multiple sensing model, the permanent magnetism sheet that will enclose rolling disc different-diameter place has been arranged to magnetic polarity variation, magnetic flux change, again the sensing characteristics of same Hall changed, make its original that Hall that has changed sensing characteristics produce different transducing signals to a plurality of permanent magnetism sheets of same distribution, obtain different control models.The variation pattern of a plurality of permanent magnetism sheets is mainly magnetic polarity variation, change in location, three kinds of variation patterns of magnetic flux change, and purpose makes Hall can obtain the permanent magnetism sheet motor message that ad-hoc location is more accurate, control is with better function, more.A plurality of permanent magnetism sheet magnetic polarities alternately change with the arctic, the South Pole, and the signal that Hall is produced is square wave, controls with better function, more; It is more accurate that a plurality of permanent magnetism sheet change in location, magnetic flux change make signal that Hall produces can express the position of permanent magnetism sheet, thereby can express the state of kinematic motion of ad-hoc location.For morpet, the ad-hoc location of expressing stretcher is extremely important at what state of kinematic motion because the state of kinematic motion direct representation of stretcher the power-assisted need state of people to car.
Structure of the present invention is:
Many magnetic sheets and magnetic flow is the rotating disc type sensitive member of uneven distribution all, comprise a rolling disc 1 and many pieces of permanent magnetism sheets 2, it is characterized in that: be pasted with many pieces of permanent magnetism sheets 2 on rolling disc 1,2 one-tenth annular arrangements of many pieces of permanent magnetism sheets distribute, and 2 one-tenth of many pieces of permanent magnetism sheets are dislocatedly distributed, and being dislocatedly distributed is radius mode or spacing a certain of mode that be dislocatedly distributed that be dislocatedly distributed; Or the radius mode that is dislocatedly distributed, the array mode that has again spacing to be dislocatedly distributed arranged namely;
The radius mode of being dislocatedly distributed is: these a plurality of permanent magnetism sheets 2 are distributed in annular arrangement 6 scopes, have at least a circular rail trace to run through whole permanent magnetism sheets 2 between the interior circular trajectory 5-1 of annular arrangement 6 and outer ring trajectory 5-2; Interior circular trajectory 5-1 and outer ring trajectory 5-2 are concentric circles, have at least two permanent magnetism sheets 2 not identical to the distance at circle centers, interior circular trajectory 5-1 places;
The spacing mode of being dislocatedly distributed is: the distance between adjacent permanent magnet piece 2 is magnetic sheet spacing 7; Have at least the length of two magnetic sheet spacings 7 not identical;
In certain one side of rolling disc 1, the magnetic polarity of adjacent permanent magnet piece 2 is opposite, and namely simultaneously to go up the magnetic polarity distribution mode of whole permanent magnetism sheets 2 be the N utmost point, the S utmost point, the N utmost point, the S utmost point, the N utmost point, the S utmost point for certain of rolling disc 1 Have at least the magnetic flow of two pieces of permanent magnetism sheets 2 not identical;
Be pasted with on rolling disc 1 surface that permanent magnetism sheet 2 is arranged and permanent magnetism sheet 2 surfaces and seize magnetic sheet layer 8 on both sides by the arms, permanent magnetism sheet 2 quilts are seized on both sides by the arms to be fixed on rolling disc 1 and to seize on both sides by the arms between magnetic sheet layer 8;
Also comprise a Hall 3, Hall 3 is positioned at certain one side of rolling disc 1, and Hall 3 is located near permanent magnetism sheet 2 also can experience the position of permanent magnetism sheet 2 magnetic flow, between Hall 3 and permanent magnetism sheet 2, spacing is arranged; Hall 3 is opposite magnetic polarities to be produced the Hall of square wave output signal.
Prior art is all that depression or hole are set on rolling disc, permanent magnets is entrapped in the depression or hole of rolling disc, this technique will be bored depression or hole on rolling disc, can only be by hand in the depression or hole that are entrapped in rolling disc of one piece one piece of many pieces of permanent magnets, consumption very consuming time is artificial, and depression or hole and the essential size shape no-float of permanent magnets, this point is difficult to accomplish.Because depression or hole are crossed greater than permanent magnets, during rolling disc, permanent magnets is vibrated in depression or hole, very fragile permanent magnets; Depression or hole are the flush fit permanent magnets, are difficult to again permanent magnets is entrapped in the depression or hole of rolling disc.Be to solve the problem of prior art, the present invention is arranged on permanent magnetism sheet 2 on rolling disc 1 with the method for stickup, is mainly can greatly reduce permanent magnetism sheet 2 is fixed on technique on rolling disc 1.For preventing the solid problem that is pasted not strongly, the present invention is pasted with on rolling disc 1 surface that permanent magnetism sheet 2 is arranged and permanent magnetism sheet 2 surfaces and seizes magnetic sheet layer 8 on both sides by the arms, permanent magnetism sheet 2 is seized on both sides by the arms to be fixed on rolling disc 1 and to seize on both sides by the arms between magnetic sheet layer 8, the rotation of rolling disc 1 can not make 2 displacements of permanent magnetism sheet, guarantee that the relative position between many pieces of permanent magnetism sheets 2 is constant, the sensing capabilities of sensitive member is constant, and sensing model is stable.Pasting one, to seize magnetic sheet layer 8 on both sides by the arms more more convenient in the depression that is entrapped in rolling disc 1 of one piece one piece of piece permanent magnets or hole manying, simply, can not damage permanent magnet by hand than prior art.
In a word, the present invention is at the process aspect of making sensitive member, and the present invention can be located at permanent magnetism sheet 2 on rolling disc 1 with the method for pasting with seizing magnetic sheet layer 8 structure on both sides by the arms as technical guarantee, thereby has advantages of that making is simple, convenient reducing costs; Do not have prior art the sort of when rolling disc 1 rotates, permanent magnetism sheet 2 damages the problem of permanent magnetism sheet 2 with rolling disc 1 collision, and visible the present invention has obvious technological advance than prior art.
Seize magnetic sheet layer 8 on both sides by the arms and select non-magnet_conductible material, or make with non-magnet_conductible material.
Rolling disc 1 can be the on-deformable plate of material such as plastic flagstone, the exhausted plate of high strength, copper coin, aluminium sheet.When using sensitive member, rolling disc 1 will rotate, and the center of rotation is exactly that 2 one-tenth annular arrangement distributions of a plurality of permanent magnetism sheets are at the center of circle.
A plurality of permanent magnetism sheets 2 are in annular arrangement 6 scopes, the purpose that becomes annular arrangement to distribute is only to experience the state of kinematic motion of whole permanent magnetism sheets 2 on rolling disc with a Hall 3, namely experience movement position and the speed of whole permanent magnetism sheets 2 on rolling disc, and the variation of speed, or title acceleration/accel, this Hall 3 just can be expressed the state of kinematic motion of permanent magnetism sheet 2 and output electrical signals with a continuous electric signal, because it is on rolling disc 1 that whole permanent magnetism sheet 2 is separately fixed at rolling disc, the continuous electric signal of Hall 3 generations just can be expressed the state of kinematic motion of rolling disc again.If this continuous electric signal is used for controlling other object, this continuous electric signal is exactly control signal.If be used for controlling the motor of morpet, also need with micro controller system or other electron component as sensing signal processor, position in control signal, speed, acceleration/accel key element are converted to need what power-assisted signal of power-assisted, the function that converts is exactly the power-assisted demand model, or claims the power-assisted model.
2 one-tenth meanings that are dislocatedly distributed of a plurality of permanent magnetism sheets are: making in the electric signal that Hall 3 produces is not duplicate impulse singla, but the different impulse singla of pulse width, distinguish the diverse location of permanent magnetism sheet 2 with distinguishing impulse singla, thereby can obtain the state of kinematic motion of diverse location permanent magnetism sheet 2.But reach accurate expression rolling disc certain position, or each there is the state of kinematic motion of permanent magnetism sheet 2.As being used for morpet, but accurate expression ride in the demand of diverse location to power-assisted, make the expression of power-assisted demand more accurate, car is just more consistent with people's cooperation.
The permanent magnetism sheet 2 radius modes of being dislocatedly distributed are: the permanent magnetism sheet 2 that has is close to the center of turn of rolling disc, and some permanent magnetism sheets 2 are away from the center of turn of rolling disc.No matter but far and near, permanent magnetism sheet 2 must can be experienced, can produce in the scope of electric signal 3 of Halls.The scope that can produce electric signal is exactly the scope between interior circular trajectory 5-1 and outer ring trajectory 5-2.For guaranteeing that Hall 3 can produce electric signal, have at least a circular rail trace to run through whole permanent magnetism sheets 2 between circular trajectory 5-1 and outer ring trajectory 5-2 in requiring on structure.Have at least two permanent magnetism sheets 2 not identical to the distance at circle centers, interior circular trajectory 5-1 places, certainly can each permanent magnetism sheet 2 not identical to the distance at circle center, the radius that is each permanent magnetism sheet 2 is not identical, so that each pulse of Hall 3 electric signal can be illustrated in permanent magnetism sheet 2, make each pulse can represent a rolling disc position.
The permanent magnetism sheet 2 spacing modes of being dislocatedly distributed are: with the outward flange of permanent magnetism sheet 2 as the basis of measuring spacing, have at least the length of two permanent magnetism sheet spacings 7 not identical, certainly length that can every permanent magnetism sheet spacing 7 is not identical, so that each pulse of Hall 3 electric signal can be illustrated in permanent magnetism sheet 2, make each pulse can represent a rolling disc position.
The not identical meaning of a plurality of permanent magnetism sheet 2 magnetic flow is: making in the electric signal that Hall 3 produces is not duplicate impulse singla, but the different impulse singla of peak valley difference, distinguish the diverse location of different permanent magnetism sheets 2 with distinguishing impulse singla, thereby can obtain the state of kinematic motion of diverse location permanent magnetism sheet 2.But reach accurate expression rolling disc certain position, or each there is the state of kinematic motion of permanent magnetism sheet 2.As being used for morpet, but accurate expression ride in the demand of diverse location to power-assisted, make the expression of power-assisted demand more accurate, car is just more consistent with people's cooperation.
The not identical namely magnetic flow of a plurality of permanent magnetism sheets 2 of a plurality of permanent magnetism sheet 2 magnetic flow is vicissitudinous, the scope of its variation should be the sensitive magnetic flow scope of the same Hall 3 of invariant position, that is to say, the peak of a plurality of permanent magnetism sheet 2 magnetic flow and minimum should be in the sensitive magnetic flow scopes of Hall 3.
The magnetic polarity of adjacent permanent magnet piece 2 is very important technical characterictic on the contrary, all the magnetic polarity distribution mode of permanent magnetism sheet 2 is the N utmost point, the S utmost point, the N utmost point, the S utmost point, the N utmost point, the S utmost point ... make the Hall 3 high and low alternate square-wave signals of output, because the rolling disc that stops as limited size, rotating the accurate variable signal that will obtain in a week as much as possible, should be to select square wave certainly.The time that the peak-to-valley value of square-wave signal changes is short, can within the regular hour, produce the signal of controlling meaning that has as much as possible.The structure generation square wave that the magnetic polarity of adjacent permanent magnet piece 2 is opposite, and the identical structure generation sinusoidal waveform of the magnetic polarity of adjacent permanent magnet piece 2, during especially for morpet, generally placing restrictions at diameter as the rolling disc of sensing element is 10-15 centimetre, to obtain to control the signal of function in this limit scope, rotate a week, produce square wave than producing the available pulse number of sinusoidal waveform and many 7-9 doubly.Nature, the opposite structure of the magnetic polarity of adjacent permanent magnet piece 2 to the control effect of morpet more, the people coordinates with car better, the rider people feels more comfortable.
The thickness of permanent magnetism sheet 2 is 0.2 ~ 0.5 millimeter.As long as selecting magnetic flow is 146---279 (BH) max/KJm
-3 Permanent magnetism sheet 2, the thickness of permanent magnetism sheet 2 is 0.2 ~ 0.5 millimeter just can guarantee that Hall 3 can normally experience the magnetic field of permanent magnetism sheet 2, makes Hall 3 output electrical signals.Experiment showed, that the magnetic flow when permanent magnetism sheet 2 is 146---279 (BH) max/KJm
-3The time, the thickness of permanent magnetism sheet 2 is 0.2 ~ 0.5 millimeter, Hall 3 can normally be experienced magnetic field and the output electrical signals of permanent magnetism sheet 2.The thickness of selecting permanent magnetism sheet 2 is 0.2 ~ 0.5 millimeter, and purpose is the weight that alleviates permanent magnet, because alleviate the weight of permanent magnet, in the time of can making rolling disc 1, the inertia of permanent magnetism sheet 2 is little, and permanent magnetism sheet 2 can not be shifted, and sensing model is stable.
Seize a certain of the financial aluminium sheet of magnetic sheet layer 8 or sheet plastic on both sides by the arms.Finance aluminium sheet or sheet plastic and rolling disc 1 compress the use of permanent magnetism sheet 2.
Seizing magnetic sheet layer 8 on both sides by the arms is at rolling disc 1 surface and the permanent magnetism sheet 2 surface casting lining cement liquid that permanent magnetism sheet 2 is arranged, and becomes solid layer after this lining cement liquid solidifies.Be cast in rolling disc 1 surface and permanent magnetism sheet 2 surfaces with lining cement liquid, become fixedly permanent magnetism sheet 2 techniques of seizing magnetic sheet layer 8 on both sides by the arms after solidifying than fixedly the technique of permanent magnetism sheet 2 is simpler with financial aluminium sheet or sheet plastic, and fixedly permanent magnetism sheet 2 the effect of shift position is also not better, sensing model is more stable.
The weight that alleviates permanent magnetism sheet 2 has been arranged, compressed and seize permanent magnetism sheet 2, lining cement liquid casting solidification on both sides by the arms and after cementing the technology of permanent magnetism sheet 2, paste the problem that many pieces of permanent magnetism sheets 2 just do not have permanent magnetism sheet 2 displacement when rolling disc 1 rotates on rolling disc 1, sensing model is stable.Do not need with the prior art of complex process, permanent magnet to be entrapped in the depression or hole of rolling disc.
Rolling disc 1 is provided with centre hole in the round scope in the interior circular trajectory 5-1 place of a plurality of permanent magnetism sheets 2.If rolling disc 1 will be set on a turning cylinder and use, will establish a hole that wears turning cylinder on rolling disc 1; For guaranteeing that rolling disc 1 is when rotating with turning cylinder, Hall 3 can be experienced the motor message of each permanent magnetism sheet 2 on rolling disc 1, wear the center that the hole should be located at the interior circular trajectory 5-1 place circle scope of a plurality of permanent magnetism sheets 2 on rolling disc 1, because interior circular trajectory 5-1 and outer ring trajectory 5-2 are concentric circles, certainly wear the center of circular rail trace 5-2 place circle scope outside, hole, wearing the hole is the hole, center of interior circular trajectory 5-1 and outer ring trajectory 5-2, i.e. centre hole.That is to say, centre hole is not necessarily circular, can be the shapes such as square, triangle, in order to can be nested with the turning cylinder of the shapes such as square, triangle, but the interior sky of centre hole necessarily comprises round center, interior circular trajectory 5-1 place, could use a Hall 3 to experience the motor message of whole permanent magnetism sheets 2 on rolling disc 1 rolling disc.
Have at least the length of a permanent magnetism sheet spacing 7 to be not equal to other any one permanent magnetism sheet spacing 7, and have at least the magnetic flow of a permanent magnetism sheet 2 to be not equal to the magnetic flow of other any one permanent magnetism sheet 2.Be not equal to other length, namely the permanent magnetism sheet spacing 7 of particular length can be used for representing the position of bicycle pedal.Preferably have at least the length of two permanent magnetism sheet spacings 7 to be not equal to other any one permanent magnetism sheet spacing 7, the permanent magnetism sheet spacing 7 of these two particular length corresponds respectively to two stretchers, is used for the position of two stretchers of expression bicycle.Equally, be not equal to other magnetic flow, namely special values of magnetic flux also can be used for representing the position of bicycle pedal.Preferably have at least the magnetic flow of two each and every one permanent magnetism sheets 2 to be not equal to the magnetic flow of other any one permanent magnetism sheet 2, the permanent magnetism sheet 2 of these two special values of magnetic fluxes corresponds respectively to two stretchers, is used for the position of two stretchers of expression bicycle.That is to say, the position of a stretcher is with the permanent magnetism sheet spacing 7 of a particular length, and also the permanent magnetism sheet 2 with a special values of magnetic flux represents, its accuracy and reliability improves greatly.Because the circular movement of bicycle pedal is judged pedal position for the speed that obtains this circular movement, determine that the power-assisted model of circular movement is extremely important next time.
Rolling disc 1 is plastic flagstone, aluminum board, copper material plate a certain of non-magnet_conductible material.Be the opposite structure of magnetic polarity of adjacent permanent magnet piece 2 due to the present invention, can make the edge of adjacent permanent magnet piece 2 almost can be affixed the electric signal that also can make Hall 3 outputs that the control function is arranged.Plastic flagstone, aluminum board, the copper material plate of handy non-magnet_conductible material, or other on-deformable rolling disc.
Structure of the present invention is:
Advantage of the present invention: simple in structure, cost is low, the permanent magnetism sheet quantity on the permanent magnetism loop is not placed restrictions on, the impulse singla of outputting standard, there is no signal blind zone, only just the total movement state, output signal of energy perfect representation Moving plate can distortion drift about, represent can have in fixed position, place, output signal with permanent magnetism sheet change in location the movement position of each permanent magnetism sheet with one group of output signal of a Hall, be used for morpet, make power-assisted output can highly coordinate with the power-assisted demand and the cyclist is felt well.
［ 1 ］ technique of stickup permanent magnetism sheet is simple: the technique of pasting many pieces of permanent magnetism sheets on rolling disc is simple.Prior art is all that depression or hole are set on rolling disc, permanent magnets is entrapped in the depression or hole of rolling disc, this technique will be bored depression or hole on rolling disc, can only be by hand in the depression or hole that are entrapped in rolling disc of one piece one piece of many pieces of permanent magnets, consumption very consuming time is artificial, and depression or hole and the essential size shape no-float of permanent magnets, this point is difficult to accomplish.Because depression or hole are crossed greater than permanent magnets, during rolling disc, permanent magnets is vibrated in depression or hole, very fragile permanent magnets; Depression or hole are the flush fit permanent magnets, are difficult to again permanent magnets is entrapped in the depression or hole of rolling disc.
［ 2 ］ the permanent magnetism sheet of pasting can the shift position: the weight that alleviates the permanent magnetism sheet has been arranged, compressed and seize permanent magnetism sheet, lining cement liquid casting solidification on both sides by the arms and after cementing the technology of permanent magnetism sheet, paste many pieces of permanent magnetism sheets on rolling disc and just do not have the permanent magnetism sheet when turn disc, produce the problem of displacement with respect to rolling disc, the permanent magnetism sheet is synchronized with the movement with rolling disc all the time, and sensing model is stable.Do not need with the prior art of complex process, permanent magnet to be entrapped in the depression or hole of rolling disc.
The present invention, can be located at the permanent magnetism sheet on rolling disc with the method for pasting with seizing magnetic sheet layer structure on both sides by the arms as technical guarantee at the process aspect of making sensitive member, thereby has advantages of that making is simple, convenient reducing costs; Can be when turn disc, permanent magnetism sheet and rolling disc collision and damage the permanent magnetism sheet and have the durability advantage, visible the present invention has obvious technological advance than prior art.
［ 3 ］ can regulate the model of Hall output signal: the permanent magnetic plate of outer sleeve tube end plate can carry out magnetic north pole or south magnetic pole changes, change of magnetic field strength, and the magnetic conductive metal sheet of tube end plate can carry out magneto-conductivity variation, variation in thickness.These variations can make same Hall obtain different induced signal models, namely can regulate the different signal model of same Hall output.Signal model changes, and just can select different signal models to control and be controlled object, realizes personalized control.As being used for morpet, can be according to the strength of different people, or the custom of exerting oneself, ride over Plain or mountain region and the signal model selecting to be fit to, namely have the function of regulating at any time power-assisted by personalization.
［ 4 ］ simple in structure, without elastic component, machinery-free fault: rotate output signal with a plurality of permanent magnetism sheets of Hall impression, the speed that provides with Chinese patent 01201843.0 can be calculated the principle of moment, available multiple math modeling is calculated the moment parameter of morpet, be used for controlling the motor of morpet, realize power-assisted.Without elastic component, simple in structure, cost lower than with elastic component and mechanically stressed sensor.After having avoided long-time use, each mechanical part distortion, machinery-free fault, the not good problem of cooperation.
［ 5 ］ magnetic polarity is opposite, the output square-wave signal, has accurate control function: because the magnetic polarity of adjacent permanent magnet piece is opposite, and Hall is selected the Hall that opposite magnetic polarities is produced the square wave output signal, adjacent permanent magnet piece no matter spacing what, even very close to each other between adjacent permanent magnet piece, Hall can be exported square-wave signal too.As being used for morpet, the motor of controlling morpet with the output signal of square wave is better than using sinusoidal waveform, because the rectangle wave energy is accomplished signal point at any time, the signal implication of expression movement position and speed is accurate, but thereby the movement position of Precise Representation booster bicycle pedal and speed, in order to go out the correct power-assisted demand of this state of kinematic motion with the accurate position of pedal and speed calculation.
［ 6 ］ magnetic polarity of adjacent permanent magnet piece is opposite, permanent magnetism sheet quantity is not placed restrictions on, can increase the sensing point position: because magnetic polarity is opposite as far as possible, the output square-wave signal, even adjacent permanent magnet piece gapless, the signal of its output has remained number, differentiable square-wave signal, still has the control function, that is to say to export the unchanged linear signal of not controlling function.As being used for morpet, owing to being placed restrictions on the rolling disc diameter of pedal linkage, just can be on the rolling disc of prescribed level, increase as far as possible permanent magnetism sheet quantity, as far as possible increase the sensing point position, represent bicycle pedal movement position and speed, the Precise Representation state of kinematic motion with as much as possible transducing signal.
［ 7 ］ magnetic polarity of adjacent permanent magnet piece is opposite, can arrange that the permanent magnetism sheet is many, the sensing point position is many, state of kinematic motion to rolling disc represents accurately: to being used for morpet, fixedly the rolling disc size of permanent magnetism sheet is strictly placed restrictions on, general rolling disc diameter can only be in 10-15 centimetre, in order to make Hall that the magnetic pole signal that obtains the permanent magnetism sheet under the condition of spacing arranged, the diameter of its permanent magnetism sheet is at least Ф 0.6-0.8 centimetre, and the rolling disc of diameter 10-15 centimetre peripheral zero-lash arranges 35-73 permanent magnetism sheet ［ 10-1*3.14/0.8=35; 15-1*3.14/0.6=73, namely stretcher circles, and Hall can obtain the motor that 35-73 signal is used for controlling morpet.But if the identical prior art of adjacent permanent magnet piece magnetic polarity, adjacent permanent magnet piece on diameter 10-15 centimetre rolling disc, can only arrange at most 5-8 permanent magnetism sheet ［ 10-1*3.14/5.8=5 by 5 centimetres of spacings; 15-1*3.14/5.6=8.As seen, the art of this patent can arrange doubly ［ 35/5=6 of permanent magnetism sheet 7-9 than prior art more; 73/8=9 ］, 30-65 permanent magnetism sheet ［ 35-5=30 is set more; 73-8=65 ］.So rolling disc circles, the art of this patent has increased 7-9 turn disc site signal doubly than prior art.Electric machine control accuracy rate to morpet has improved 7-9 doubly naturally, make the cyclist also improve 7-9 doubly to power-assisted demand accuracy rate, car and people's cooperate degree improves greatly, and cyclist's comfort increases greatly, is no longer boosted vehicle the sort of one fast one slow uncomfortable sensation of prior art.The present invention asks someone according to the experience of reality, when roughly 15 permanent magnetism sheets being set uniformly on rolling disc, substantially having eliminated prior art and has only established 5-8 permanent magnetism sheet and make boosted vehicle the sort of one fast one slow uncomfortable sensation; When roughly 20 permanent magnetism sheets being set uniformly on rolling disc, car coordinates oneself can satisfy human needs with the people's, and the sensation of riding boosted vehicle is very comfortable.
［ 8 ］ there is no signal blind zone, the power-assisted that power-assisted demand whenever all can obtain to be complementary: this patent can arrange at most 35-73 permanent magnetism sheet at the rolling disc periphery of diameter 10-15 centimetre, and between each permanent magnetism sheet, average angle is the 5-10 degree.Be used for morpet, when starting or move, stretcher is spent in the zone from leaving 35 of 10-45 degree angle, summit, there be 4-7 permanent magnetism sheet in the position of leaving degree angle, summit 10, a signal just to be arranged, the exportable 4-7 of Hall control signal reacts the power-assisted demand, can realize any position, have power-assisted just can obtain the excellent technique effect of corresponding power-assisted any time, make car and people's no-float, it is laborsaving comfortable again that the cyclist feels.
［ 9 ］ only with a Hall, a control signal represents the total movement state of rolling disc, the state of kinematic motion of control signal and rolling disc is in full accord, control signal and people's demand is in full accord: a plurality of permanent magnetism sheets are fixed on rolling disc, the permanent magnetism sheet is synchronizeed with rolling disc and is rotated, with a whole permanent magnetism sheet motor message of Hall impression, the state of kinematic motion of the control signal of Hall output and rolling disc is in full accord, just in full accord with people's demand, control signal does not have original segmentation error and signal drift problem yet.Even the hall sensing parameter changes, be also whole control signal parallel, as long as it is wider to receive the range of receiving of electric machine controller of Hall control signal, the control effect of the Hall control signal that has changed becomes systematicness to change.As being used for morpet, the power-assisted demand model can distortion, and power-assisted output and power-assisted demand still keep the matching relationship of original model, and the systematicness that the cyclist is easy to grasp this power-assisted ability changes.
［ 10 ］ have dislocation between the permanent magnetism sheet and also have magnetic flux change, the permanent magnetism sheet represents the state of kinematic motion of specific site more reliably: because the permanent magnetism sheet misplaces in radial direction dislocation or circular arc line spacing, dislocation permanent magnetism sheet makes the control signal of the peculiar wave space of Hall output; Again because the magnetic flow of each permanent magnetism sheet also changes, each permanent magnetism sheet also makes the control signal of the peculiar peak valley difference waveform of Hall output, make each square wave of control signal that wave space and two kinds of wave form varies modes of peak valley difference be arranged, that is to say, represent a certain movement position of permanent magnetism sheet with wave space and two kinds of parameters of peak valley difference, control signal represents that the state of kinematic motion of permanent magnetism sheet is more accurate.The specific dislocation site of oneself is arranged as each permanent magnetism sheet, also have special magnetic flow, what permanent magnetism sheets can reach has, and just can obtain how many individual motion state signal that two kinds of wave form varies modes are arranged.As being used for morpet, the rolling disc diameter is in 10-15 centimetre, and rolling disc circles, and the state of kinematic motion control signal that it is two kinds of wave form varies modes that Hall can obtain 35-73 different loci is known the power-assisted demand in 35-73 site naturally.Clearly, rolling disc circles, the power-assisted demand that the power-assisted demand that prior art can only have at most 5-8 sinusoidal waveform to represent, the power-assisted desired signal that is nothing like the maximum available 35-73 of this patent two kinds of wave form varies modes more can be truly, the cyclist is reacted on multiple data quantity ground, reliability highland.That is to say, morpet the art of this patent, Che Gengneng and people's demand match consistent, and the cyclist experiences stretcher at any turned position, but oneself regulation speed fully all, and traveling comfort is good.And but the morpet of prior art can only be at maximum 5-8 turned positions ability regulation speed.
Description of drawings
Fig. 1 is many magnetic sheets position and each point magnetic flow uneven distribution on rolling disc, and faces mutually the sensitive member structural representation that permanent magnetism sheet N-S replaces, and in figure, the different expression of permanent magnetism sheet line weight magnetic flow is different;
Fig. 2 is high density magnetic sheet position and each point magnetic flow uneven distribution on rolling disc, and faces mutually the sensitive member structural representation that the permanent magnetism sheet becomes N-S to replace, and in figure, the different expression of permanent magnetism sheet line weight magnetic flow is different.
Fig. 3 is cross-sectional view of the present invention.
In figure, 1 is rolling disc, the 2nd, and permanent magnetism sheet, the 3rd, Hall, 5-1 are that interior circular trajectory, 5-2 are outer ring trajectories, the 6th, and annular arrangement, the 7th, is seized magnetic sheet layer, the 9th on both sides by the arms, outer sleeve, the 10th, tube end plate at magnetic sheet spacing, 8.
The specific embodiment
Embodiment 1, many magnetic sheets and magnetic flow is the rotating disc type sensitive member of uneven distribution all
As Fig. 1, be pasted with 20 permanent magnetism sheets 2 on the plane with a face of 10.0 centimetres of rolling discs 1 of highstrenghtpiston's injection molded diameter.Also be pasted with on rolling disc 1 surface that permanent magnetism sheet 2 is arranged and permanent magnetism sheet 2 surfaces and seize magnetic sheet layer 8 on both sides by the arms, permanent magnetism sheet 2 quilts are seized on both sides by the arms to be fixed on rolling disc 1 and to seize on both sides by the arms between magnetic sheet layer 8.The thickness of permanent magnetism sheet 2 is 0.3 millimeter, and the magnetic flow of permanent magnetism sheet 2 is 146---279 (BH) max/KJm
-3In some values.
Seizing magnetic sheet layer 8 on both sides by the arms is rolling disc 1 surface and permanent magnetism sheet 2 surface casting polyurethane lining cement liquid that permanent magnetism sheet 2 is being arranged, after solidifying, this polyurethane lining cement liquid becomes solid layer, this solid layer is exactly to be used for when rolling disc 1 rotates, fix 20 permanent magnetism sheets 2 with respect to rolling disc 1 not the shift position seize magnetic sheet layer 8 on both sides by the arms.
The structure of rolling disc 1, permanent magnetism sheet 2, Hall 3 is as follows:
Each permanent magnetism sheet 2 is fixed on circular trajectory 5-1 in 8.5 centimetres of diameters, and in annular arrangement 6 scopes between 9.5 centimetres of outer ring trajectory 5-2, has 2 one-tenth radiuses of a plurality of permanent magnetism sheets to be dislocatedly distributed, and has 2 one-tenth spacings of a plurality of permanent magnetism sheets to be dislocatedly distributed.
The radius mode of being dislocatedly distributed is: these a plurality of permanent magnetism sheets 2 are distributed in annular arrangement 6 scopes, have at least a circular rail trace to run through whole permanent magnetism sheets 2 between the interior circular trajectory 5-1 of annular arrangement 6 and outer ring trajectory 5-2; Interior circular trajectory 5-1 and outer ring trajectory 5-2 are concentric circles, have at least two permanent magnetism sheets 2 not identical to the distance at circle centers, interior circular trajectory 5-1 places;
The spacing mode of being dislocatedly distributed is: the distance between adjacent permanent magnet piece 2 is permanent magnetism sheet spacing 7; Have at least the length of two permanent magnetism sheet spacings 7 not identical.
Have the length of two permanent magnetism sheet spacings 7 to be not equal to the length of other any one permanent magnetism sheet spacing 7, and the length of these two permanent magnetism sheet spacings 7 is also unequal.The position that two permanent magnetism sheets 2 are arranged at these two permanent magnetism sheet spacing 7 places is just in time at the two ends of 1 a certain diameter of rolling disc.The magnetic flow of these two permanent magnetism sheets 2 is not equal to the magnetic flow of other any one permanent magnetism sheet spacing 7, and the magnetic flow of these two permanent magnetism sheets 2 is also unequal, and these two permanent magnetism sheets 2 are used for the movement position of two stretchers of expression on morpet.
The opposite mode of magnetic polarity of 2 one-tenths adjacent permanent magnet pieces of whole permanent magnetism sheets 2 of pasting at face of rolling disc 1 is arranged, and namely on rolling disc 1 face, the magnetic polarity distribution mode of whole permanent magnetism sheets 2 is the N utmost point, the S utmost point, the N utmost point, the S utmost point, the N utmost point, the S utmost point ...
Be located at a Hall 3 side that rolling disc 1 has permanent magnetism sheet 2, Hall 3 is located at the position near permanent magnetism sheet 2, be Hall 3 be located at each permanent magnetism sheet 2 circular rail trace 5-1 and annular arrangement 6 scopes between outer ring trajectory 5-2 in, Hall 3 keeps the spacing distance of 0.3 centimetre with each permanent magnetism sheet 2 of rotary state, make each permanent magnetism sheet 2 of rotation through Hall 3 time, Hall 3 can produce the square wave electric signal output of a correspondence.
Rolling disc 1 is provided with centre hole at the interior circular trajectory 5-1 center of these whole permanent magnetism sheets 2, and centre hole is used for being enclosed within the pedal axis of morpet or runner rotating shaft to be used.
As Fig. 1,3, as embodiment 1, and Hall 3 is at that end near permanent magnetism sheet 2, cover has the outer sleeve 9 that can discharge, the cylinder sidewall of outer sleeve 9 is that non-magnetic plastics are made, and the cylinder sidewall of outer sleeve 9 is connected with the spiral that Hall 3 can discharge, and the tube end plate 10 of outer sleeve 9 is permanent magnetic plates.The tube end plate 10 of permanent magnetism can discharge with the plastic barrel sidewall of outer sleeve 9.The tube end plate 10 of permanent magnetism can be faced with magnetic north pole or south magnetic pole the inductive head of Hall 3.Tube end plate 10 its strong magnetic flow of permanent magnetism are 10% of magnetic flux value minimum in a plurality of permanent magnetism sheets 2, i.e. the strong magnetic flow of the tube end plate 10 of permanent magnetism minimum magnetic flow in a plurality of permanent magnetism sheets 2.Make the tube end plate 10 of permanent magnetism can not cover the stimulation of 2 pairs of Halls 3 of a plurality of permanent magnetism sheets.Other structure is same as embodiment 1.
As Fig. 1,3, as embodiment 1, and Hall 3 is at that end near permanent magnetism sheet 2, cover has the outer sleeve 9 that can discharge, outer sleeve 9 is made for the sheet iron of magnetic conduction, and the cylinder sidewall of outer sleeve 9 is connected with the spiral that Hall 3 can discharge, and the tube end plate 10 of outer sleeve 9 is sheet irons.The thickness of different outer sleeve 9 its tube end plate 10 sheet irons is different, thereby the magnetic conduction amount is different.The tube end plate 10 of outer sleeve 9 is available thin magnetic plate also.Other structure is same as embodiment 1.
Embodiment 4, the many magnetic sheets of high density and magnetic flow is the rotating disc type sensitive member of uneven distribution all
A face as the high strength aluminium rolling disc 1 of 10.0 centimetres of Fig. 2,3 diameters arranges 40 permanent magnetism sheets 2 of diameter 0.4-0.6 centimetre.The thickness of permanent magnetism sheet 2 is 0.2 millimeter, and the magnetic flow of permanent magnetism sheet 2 is 146---279 (BH) max/KJm
-3Different selective value in scope, and it is unequal to face mutually the magnetic flow of permanent magnetism sheet 2.Hall 3 keeps the spacing distance of 0.2 centimetre with each permanent magnetism sheet 2 of rotary state, makes each permanent magnetism sheet 2 of rotation through Hall 3 time, and Hall 3 can produce the square wave electric signal output of a correspondence.The structure of other rolling disc 1, permanent magnetism sheet 2, Hall 3 is same as embodiment 2.
Embodiment 5, the many magnetic sheets of high density of seizing magnetic sheet layer use aluminium sheet on both sides by the arms and magnetic flow is the rotating disc type sensitive member of uneven distribution all
As Fig. 1,3, be pasted with 20 permanent magnetism sheets 2 on the plane of a face of 10.0 centimetres of aluminium sheet rolling discs 1 of diameter.Also be pasted with on rolling disc 1 surface that permanent magnetism sheet 2 is arranged and permanent magnetism sheet 2 surfaces and seize magnetic sheet layer 8 on both sides by the arms, permanent magnetism sheet 2 quilts are seized on both sides by the arms to be fixed on rolling disc 1 and to seize on both sides by the arms between magnetic sheet layer 8.The thickness of permanent magnetism sheet 2 is 0.5 millimeter, and the magnetic flow of permanent magnetism sheet 2 is 146---279 (BH) max/KJm
-3In some values.Seize the aluminium sheet of magnetic sheet layer 8 use and rolling disc 1 formed objects and thickness on both sides by the arms.Other is same as embodiment 2.
Claims (9)
1. many magnetic sheets and magnetic flow rotating disc type sensitive member of uneven distribution all, comprise a rolling disc (1) and many pieces of permanent magnetism sheets (2), it is characterized in that: be pasted with many pieces of permanent magnetism sheets (2) on rolling disc (1), many pieces of permanent magnetism sheets (2) become annular arrangement to distribute, and many pieces of permanent magnetism sheets (2) become to be dislocatedly distributed, and being dislocatedly distributed is radius mode or spacing a certain of mode that be dislocatedly distributed that be dislocatedly distributed; Or the radius mode that is dislocatedly distributed, the array mode that has again spacing to be dislocatedly distributed arranged namely;
The radius mode of being dislocatedly distributed is: these a plurality of permanent magnetism sheets (2) are distributed in an annular arrangement (6) scope, have at least a circular rail trace to run through whole permanent magnetism sheets (2) between the interior circular trajectory (5-1) of annular arrangement (6) and outer ring trajectory (5-2); Interior circular trajectory (5-1) and outer ring trajectory (5-2) are concentric circles, have at least two permanent magnetism sheets (2) not identical to the distance at circle center, interior circular trajectory (5-1) place;
The spacing mode of being dislocatedly distributed is: the distance between adjacent permanent magnet piece (2) is magnetic sheet spacing (7); Have at least the length of two magnetic sheet spacings (7) not identical;
In certain one side of rolling disc (1), the magnetic polarity of adjacent permanent magnet piece (2) is opposite, and namely simultaneously to go up the magnetic polarity distribution mode of whole permanent magnetism sheets (2) be the N utmost point, the S utmost point, the N utmost point, the S utmost point, the N utmost point, the S utmost point for certain of rolling disc (1) Have at least the magnetic flow of two pieces of permanent magnetism sheets (2) not identical;
Be pasted with on the rolling disc that permanent magnetism sheet (2) are arranged (1) surface and permanent magnetism sheet (2) surface and seize magnetic sheet layer (8) on both sides by the arms, permanent magnetism sheet (2) quilt is seized on both sides by the arms to be fixed on rolling disc (1) and to seize on both sides by the arms between magnetic sheet layer (8);
Also comprise a Hall (3), Hall (3) is positioned at certain one side of rolling disc (1), and Hall (3) is located near permanent magnetism sheet (2) also can experience the position of permanent magnetism sheet (2) magnetic flow, between Hall (3) and permanent magnetism sheet (2), spacing is arranged; Hall (3) is opposite magnetic polarities to be produced the Hall of square wave output signal.
2. many magnetic sheets according to claim 1 and magnetic flow rotating disc type sensitive member of uneven distribution all, it is characterized in that: Hall (3) is provided with the outer sleeve (9) that can discharge at that end near permanent magnetism sheet (2), outer sleeve (9) the cylinder sidewall and being connected that Hall (3) can discharge, the tube end plate (10) of outer sleeve (9) but be permanent magnetic plate or magnetic conductive metal sheet.
3. many magnetic sheets according to claim 2 and magnetic flow rotating disc type sensitive member of uneven distribution all, it is characterized in that: the thickness of permanent magnetism sheet (2) is 0.2 ~ 0.5 millimeter.
4. many magnetic sheets according to claim 2 and magnetic flow rotating disc type sensitive member of uneven distribution all, is characterized in that: seize a certain of the financial aluminium sheet of magnetic sheet layer (8) or sheet plastic on both sides by the arms.
5. many magnetic sheets according to claim 2 and magnetic flow rotating disc type sensitive member of uneven distribution all, it is characterized in that: seizing magnetic sheet layer (8) on both sides by the arms is at the rolling disc that permanent magnetism sheet (2) are arranged (1) surface and permanent magnetism sheet (2) surface casting lining cement liquid, becomes solid layer after this lining cement liquid solidifies.
6. many magnetic sheets according to claim 2 and magnetic flow rotating disc type sensitive member of uneven distribution all, it is characterized in that: Hall (3) is located between interior circular trajectory (5-1) and outer ring trajectory (5-2).
7. many magnetic sheets according to claim 2 and magnetic flow rotating disc type sensitive member of uneven distribution all is characterized in that: rolling disc (1) is provided with centre hole in the circle scope of interior circular trajectory (5-1) place of a plurality of permanent magnetism sheets (2).
According to claim 1 to 7 any one described many magnetic sheet and magnetic flow rotating disc type sensitive member of uneven distribution all, it is characterized in that: have at least the length of a permanent magnetism sheet spacing (7) to be not equal to other any one permanent magnetism sheet spacing (7), and have at least the magnetic flow of a permanent magnetism sheet (2) to be not equal to the magnetic flow of other any one permanent magnetism sheet (2).
9. many magnetic sheets according to claim 8 and magnetic flow rotating disc type sensitive member of uneven distribution all is characterized in that: rolling disc (1) is plastic flagstone, aluminum board, copper material plate a certain of non-magnet_conductible material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310309421.8A CN103381874B (en) | 2012-07-28 | 2013-07-23 | Rotating disc type sensing element with multiple magnetic sheets and magnetic flux both unevenly distributed |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210263460.4 | 2012-07-28 | ||
| CN2012102634604A CN102795295A (en) | 2012-07-28 | 2012-07-28 | Turntable sensing element with multiple magnets and non-uniform distribution of magnetic flux |
| CN2012102634604 | 2012-07-28 | ||
| CN201310309421.8A CN103381874B (en) | 2012-07-28 | 2013-07-23 | Rotating disc type sensing element with multiple magnetic sheets and magnetic flux both unevenly distributed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103381874A true CN103381874A (en) | 2013-11-06 |
| CN103381874B CN103381874B (en) | 2015-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012102634604A Pending CN102795295A (en) | 2012-07-28 | 2012-07-28 | Turntable sensing element with multiple magnets and non-uniform distribution of magnetic flux |
| CN201320438075.9U Expired - Fee Related CN203381761U (en) | 2012-07-28 | 2013-07-23 | Turntable sensing element with multiple magnetic plates and non-uniform distribution of magnetic flux |
| CN201310309421.8A Expired - Fee Related CN103381874B (en) | 2012-07-28 | 2013-07-23 | Rotating disc type sensing element with multiple magnetic sheets and magnetic flux both unevenly distributed |
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| CN2012102634604A Pending CN102795295A (en) | 2012-07-28 | 2012-07-28 | Turntable sensing element with multiple magnets and non-uniform distribution of magnetic flux |
| CN201320438075.9U Expired - Fee Related CN203381761U (en) | 2012-07-28 | 2013-07-23 | Turntable sensing element with multiple magnetic plates and non-uniform distribution of magnetic flux |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102795295A (en) * | 2012-07-28 | 2012-11-28 | 成都宽和科技有限责任公司 | Turntable sensing element with multiple magnets and non-uniform distribution of magnetic flux |
| DE102014217458A1 (en) * | 2014-09-02 | 2016-03-03 | Schaeffler Technologies AG & Co. KG | Encoder and sensor device for a rotatable machine part |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4866381A (en) * | 1986-04-08 | 1989-09-12 | Diesel Kiki Co., Ltd. | Plural magnet device for magnetically detecting rotation angle of a rotary body |
| WO1999013558A1 (en) * | 1997-09-05 | 1999-03-18 | Southern Refrigeration Group Pty. Ltd. | A brushless d.c. motor |
| CN101707879A (en) * | 2007-06-06 | 2010-05-12 | 海卓-艾尔公司 | Angular position sensor |
| CN102331268A (en) * | 2011-06-01 | 2012-01-25 | 西华大学 | Noncontact sensor |
| CN203381761U (en) * | 2012-07-28 | 2014-01-08 | 成都宽和科技有限责任公司 | Turntable sensing element with multiple magnetic plates and non-uniform distribution of magnetic flux |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19534995A1 (en) * | 1995-09-21 | 1997-03-27 | Bosch Gmbh Robert | Steering wheel angle sensor |
| CN202783638U (en) * | 2012-07-28 | 2013-03-13 | 成都宽和科技有限责任公司 | Turntable sensing element with multiple magnets and non-uniform distribution of magnetic flux |
-
2012
- 2012-07-28 CN CN2012102634604A patent/CN102795295A/en active Pending
-
2013
- 2013-07-23 CN CN201320438075.9U patent/CN203381761U/en not_active Expired - Fee Related
- 2013-07-23 CN CN201310309421.8A patent/CN103381874B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4866381A (en) * | 1986-04-08 | 1989-09-12 | Diesel Kiki Co., Ltd. | Plural magnet device for magnetically detecting rotation angle of a rotary body |
| WO1999013558A1 (en) * | 1997-09-05 | 1999-03-18 | Southern Refrigeration Group Pty. Ltd. | A brushless d.c. motor |
| CN101707879A (en) * | 2007-06-06 | 2010-05-12 | 海卓-艾尔公司 | Angular position sensor |
| CN102331268A (en) * | 2011-06-01 | 2012-01-25 | 西华大学 | Noncontact sensor |
| CN203381761U (en) * | 2012-07-28 | 2014-01-08 | 成都宽和科技有限责任公司 | Turntable sensing element with multiple magnetic plates and non-uniform distribution of magnetic flux |
Also Published As
| Publication number | Publication date |
|---|---|
| CN203381761U (en) | 2014-01-08 |
| CN102795295A (en) | 2012-11-28 |
| CN103381874B (en) | 2015-08-05 |
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